security

security is a skill for Claude Code, Codex from ruchernchong/claude-kit. It costs 16 tokens per session (550 once invoked), scanned A, original, MIT.

A security-audit workflow that sets up GitLeaks, a tool for detecting secrets in code, in a Husky pre-commit hook and then analyzes the code for security problems.

In plain words
What is it for?
Use it to configure GitLeaks, check staged changes, and audit code for OWASP vulnerabilities, authentication flaws, and data-protection issues.
Why use it?
It combines secret scanning before commits with a broader review of application security risks.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/ruchernchong/claude-kit/security
Any agent
npx skills add ruchernchong/claude-kit --skill security
Clone the repo
git clone --depth 1 https://github.com/ruchernchong/claude-kit

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for security

README.md
[![agentmods](https://agentmods.dev/badge/skills/ruchernchong/claude-kit/security.svg)](https://agentmods.dev/skills/ruchernchong/claude-kit/security)
Your own site
<a href="https://agentmods.dev/skills/ruchernchong/claude-kit/security"><img src="https://agentmods.dev/badge/skills/ruchernchong/claude-kit/security.svg" alt="Measured on agentmods" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 550 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00016 $0.00550
Opus 5 $0.00008 $0.00275
Sonnet 5 $0.00003 $0.00110
Haiku 4.5 $0.00002 $0.00055

Measured 3d ago against content hash 0b5235c317fb, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

security scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/security/SKILL.md · 79 lines

How it starts

The opening of the file, as written. The whole thing — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a security engineer setting up GitLeaks and running security audits.

Workflow

1. Setup GitLeaks in Husky Pre-commit Hook

Check if GitLeaks is configured in the project's pre-commit hook. If not, set it up.

Detection Steps
  1. Check if .husky/ directory exists
  2. Check if .husky/pre-commit contains gitleaks
Setup Steps (if GitLeaks is missing)

If .husky/ does not exist:

npx husky init

Add GitLeaks to .husky/pre-commit BEFORE any lint-staged command:

gitleaks protect --staged --verbose

Example .husky/pre-commit with lint-staged:

#!/usr/bin/env sh
. "$(dirname -- "$0")/_/husky.sh"

# Secrets detection - fail fast if secrets found
gitleaks protect --staged --verbose

# Lint staged files
npx lint-staged

If the pre-commit file already exists, insert the gitleaks line before npx lint-staged.

2. Code Security Audit

After ensuring GitLeaks is configured, spawn the security-auditor agent to analyze code:

Use the Task tool with subagent_type: security-auditor to run a security audit on the codebase.
Focus on OWASP Top 10 vulnerabilities, authentication issues, and data protection.

3. Retrospective Git History Scan (Optional)

Only run this step if the user passes --scan-history argument. This is for legacy projects being onboarded to GitLeaks.

gitleaks detect --source . --verbose

Report any secrets found in git history with:

  • File path and line number
  • Commit where the secret was introduced
  • Type of secret detected
  • Remediation steps (rotate the secret, use git-filter-repo to remove from history)

Output Format

  1. GitLeaks Setup Status: Whether hooks were already configured or newly set up
  2. Security Audit Findings: Results from the security-auditor agent
  3. History Scan Results (if --scan-history): Any secrets found in git history

Assumptions

  • GitLeaks is already installed on the system (brew install gitleaks or equivalent)
  • Target projects use Husky + lint-staged (JS/TS stack)

Read the full file on GitHub · 79 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 79 lines · 16 tokens per session scan A 0b5235c317fb

Subscribe to this mod's changes

security is a skill published in the GitHub repository ruchernchong/claude-kit (0 stars, last pushed 3mo ago), licensed MIT. It adds 16 tokens to every session and 550 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-01.

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